[PATCH] dirstate: remove double imports of errno

[Yuya Nishihara]

# HG changeset patch
# User Yuya Nishihara <yuya at tcha.org>
# Date 1393829441 -32400
#      Mon Mar 03 15:50:41 2014 +0900
# Node ID 050aca662c660b60906992c0e873db7fcd57157c
# Parent  1bc68ff4e0a26bd079e7d4f4025f4b91cc85cc11
dirstate: remove double imports of errno

diff --git a/mercurial/dirstate.py b/mercurial/dirstate.py
--- a/mercurial/dirstate.py
+++ b/mercurial/dirstate.py
@@ -4,7 +4,6 @@
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
-import errno
 
 from node import nullid
 from i18n import _